1-(2-环丙基乙基)-6-氟-1,2-二氢-4-羟基-2-氧代-3-喹啉羧酸乙酯

ethyl 10-methyl-2-oxo-8H-pyrano[3,2-g]chromene-3-carboxylate

diethyl 2-(3-chlorophenyl)propanedioate

7-hydroxy-2-methyl-1H-pyrazolo[1,5-a]pyrimidin-5-one

diethyl 2-phenacylpropanedioate